The effect of Cholesterol on life

What can turn a normal, needed, healthful substance into a dangerous killer? How can something that makes sex hormones, helps build strong bones, and balances the body's stress response also choke off oxygen and damage vital organs and tissues?It is very vital for us all to know that cholesterol is both hero and villain. While we cannot live without it, in excessive amounts it can kill us. The blood cholesterol level is the single most important factor in determining a person's risk for heart disease, the nation's number one killer.